An industrial laser (average intensity of the light is S= 1.23 x 10^9 w/m^2) is used to melt a 1kg aluminum rod with a cross sectional area of .01m^2, at an initial temperature of (20 degrees C), a specific heat of (910 j/g degrees C), and a melting point of 660 degrees C.Find the time it takes for the laser to melt the aluminum.